net: bridge: drop skb2/skb0 variables and use a local_rcv boolean

Currently if the packet is going to be received locally we set skb0 or
sometimes called skb2 variables to the original skb. This can get
confusing and also we can avoid one conditional on the fast path by
simply using a boolean and passing it around. Thanks to Roopa for the
name suggestion.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 18 insertions, 17 deletions

diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index d610644368b9..204f99304a8a 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -138,17 +138,18 @@ void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb)
 EXPORT_SYMBOL_GPL(br_deliver);
 
 /* called with rcu_read_lock */
-void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, struct sk_buff *skb0)
+void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
+		bool local_rcv)
 {
 	if (to && should_deliver(to, skb)) {
-		if (skb0)
+		if (local_rcv)
 			deliver_clone(to, skb, __br_forward);
 		else
 			__br_forward(to, skb);
 		return;
 	}
 
-	if (!skb0)
+	if (!local_rcv)
 		kfree_skb(skb);
 }
 
@@ -193,10 +194,9 @@ out:
 
 /* called under bridge lock */
 static void br_flood(struct net_bridge *br, struct sk_buff *skb,
-		     struct sk_buff *skb0,
 		     void (*__packet_hook)(const struct net_bridge_port *p,
 					   struct sk_buff *skb),
-		     bool unicast)
+		     bool local_rcv, bool unicast)
 {
 	u8 igmp_type = br_multicast_igmp_type(skb);
 	struct net_bridge_port *prev;
@@ -227,14 +227,14 @@ static void br_flood(struct net_bridge *br, struct sk_buff *skb,
 	if (!prev)
 		goto out;
 
-	if (skb0)
+	if (local_rcv)
 		deliver_clone(prev, skb, __packet_hook);
 	else
 		__packet_hook(prev, skb);
 	return;
 
 out:
-	if (!skb0)
+	if (!local_rcv)
 		kfree_skb(skb);
 }
 
@@ -242,23 +242,24 @@ out:
 /* called with rcu_read_lock */
 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast)
 {
-	br_flood(br, skb, NULL, __br_deliver, unicast);
+	br_flood(br, skb, __br_deliver, false, unicast);
 }
 
 /* called under bridge lock */
 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
-		      struct sk_buff *skb2, bool unicast)
+		      bool local_rcv, bool unicast)
 {
-	br_flood(br, skb, skb2, __br_forward, unicast);
+	br_flood(br, skb, __br_forward, local_rcv, unicast);
 }
 
 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 /* called with rcu_read_lock */
 static void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
-			       struct sk_buff *skb, struct sk_buff *skb0,
+			       struct sk_buff *skb,
 			       void (*__packet_hook)(
 					const struct net_bridge_port *p,
-					struct sk_buff *skb))
+					struct sk_buff *skb),
+			       bool local_rcv)
 {
 	struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev;
 	u8 igmp_type = br_multicast_igmp_type(skb);
@@ -295,14 +296,14 @@ static void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 	if (!prev)
 		goto out;
 
-	if (skb0)
+	if (local_rcv)
 		deliver_clone(prev, skb, __packet_hook);
 	else
 		__packet_hook(prev, skb);
 	return;
 
 out:
-	if (!skb0)
+	if (!local_rcv)
 		kfree_skb(skb);
 }
 
@@ -310,13 +311,13 @@ out:
 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
 			  struct sk_buff *skb)
 {
-	br_multicast_flood(mdst, skb, NULL, __br_deliver);
+	br_multicast_flood(mdst, skb, __br_deliver, false);
 }
 
 /* called with rcu_read_lock */
 void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
-			  struct sk_buff *skb, struct sk_buff *skb2)
+			  struct sk_buff *skb, bool local_rcv)
 {
-	br_multicast_flood(mdst, skb, skb2, __br_forward);
+	br_multicast_flood(mdst, skb, __br_forward, local_rcv);
 }
 #endif